1. Twig - a small branch or division of a branch.
2. Branch - a division of a stem, or secondary stem arising from the main stem of a plant.
3. Limb - any of the main branches arising from the trunk or a bough of a tree.
4. Trunk - the main stem of a tree, usually covered with bark.
5. Roots - the part of a plant which attaches it to the ground or to a support, typically underground, conveying water and nourishment to the rest of the plant via numerous branches and fibres.
6. Leaves - the main organ of photosynthesis and transpiration in higher plants.
7. Crown - consists of the leaves and branches at the top of a tree.
8. Fruit - the sweet and fleshy product of a tree or other plant that contains seed and can be eaten as food.
9. Taproot - main root of a plant growing straight downward from the stem.
10. Cambium - a cellular plant tissue from which phloem, xylem, or cork grows by division, resulting (in woody plants) in secondary thickening.
11. Pith - the spongy white tissue lining the rind of oranges, lemons, and other citrus fruits.
12. Heartwood - the dense inner part of a tree trunk, yielding the hardest timber.
13. Bark - tough protective covering of the woody stems and roots of trees and other woody plants.
14. Sapwood - newly formed outer wood lying between the cambium and the heartwood of a tree or woody plant.
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